Mitee cutting machine



2* sheets-sheen. 1.

(No Model.)

W. R. FOX.

MITER'GUTTING MACHINE.

No. 893.970. PatentedDec. 4, 1888.

llllllllllllllllllllll illlllllllllllllllllllIIIIlI!I (No Model.

2 Sheets-Sheetv 2. W. R. FOX. M ITBR CUTTING MACHINE.

Patented Dec. 4, 1888.

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UNITED STATES PATENT EEICE.

WILLIAM R. FOX, OF GRAND RAPIDS, MICHIGAN.

IVIITER=CUTTING MACHINE.

SPECIFICATION forming part of Letters Patent No. 393,970, dated December 4, 1888.

Application filed December 1l, 1886. Serial No.22l,339. I (No model.)

of Grand Rapids, in the county of Kent, State of IVIichigau, have invented certain new and useful Improvements in Miter-Cutting Machines;- and I do hereby declare that the following, when taken in connection with the accompanying drawings and the letters of reference marked thereon, is a full, clear, and eX- act 4description of the same, which said drawings constitute a part of this specification.

The'object of the invention is to produce a simple, cheap, and accurately-working machine, and adapted to be adjusted readily and with certainty; and it consists in the devices and combination of devices, as hereinafter more fully set forth.

Figure l isa perspective view of my improved mite'r-cutting machine, showing the position of the lever, lower rack-bar, pinion, and cutting-knives. Fig. 2 is a vertical sectional view of the same, the pinion and lever being in elevation. Fig. 3 is a plan view showing the adjustable gages with apart of the knife and its carriage in section, the rack-bar being shown in dotted lines.

A represents the bed of the machine, which is constructed, preferably, of metal.

B represents the carriage, which is constructed so as to move in longitudinal ways a b, and to which are attached the knives c c. C is the upright frame supported upon the bed A, and may be, if desired, made integral with the same. This frame consists of two corner-posts, d d, at each end of the frame, with a connecting-bar between the two, indi cated at C', the upper way in which the carriage runs being formed in the overhanging part of this bar, as shown. This bar is formed integralwith the corner-posts or may be made independent thereof and secured thereto.

D D are the gages arranged one at either end of the machine, as shown in Fig. 3. These gages are adjustable in a curved slot formed in the bed-plate, the gages being guided in their movement-by a pin projecting from the gages into the slot, with a bearing-plate connected upon the other side, as shown in Fig. 2 at 2. The gages are formed with plane faces, and the edges nearest the center are arranged in proximity to the plane of movement of the cutting-knives, so that these edges, which I have marked c, act in conjunction with the knives to form a shear cut. The edges of the gages nearest the ends of the frame bear against the end posts and serve as a support to sustain the against the cutting action of the knife. The gages have a cut-away portion at their upper ends, as shown in Figs. l and 2, terminating in a curved arm having -a semicircular beariug-face, which is in bearing contact with a projectioinf, on the crossbar of the frame.

c c are knives attached to the carriage by means of bolts and nuts passing through the slots shown in the drawings by N N. These slots N N are preferably made in the form shown, in order to allow of lateral adjustment for the knives.

F is a gear or cog wheel arranged between the carriage and bed, with its cogs engaging with the rack G upon the carriage and also with the rack H upon thev bed. The rack I-I is provided with the openings 7L, in order to allow any shavings or dust which may drop thereon to fall through out of the way, thereby preventing clogging. The lever L is attached t0 the gear F in any suitable manner; but I prefer to have it constructed to iit into a dovetailed slot or groove in a projection upon said gear, which projection is shown at F. This projection F is circular in forni and rests upon the way or guide h', h being a horizontal way formed upon the rack H, and holds the gear F at a proper distance from the rack.

I is a thumb-screw passing through the end of the gage D and also through the slot M into a block or nut, c', by means of which the said gage is adjusted to any required angle, the slots M being circular in form, as shown in Fig. 3.

J is a set-screw on the outer rear end of the gage, which strikes against a movable button, K, on the bed to limit the movement of the gage.

The gages D D vmay be set from a right angie to the knives inwardly, so as to cut the stock at any required angle, and, if desired,

`may be set outwardly beyond a right angle by withdrawing the button K from the path of the stud J. This stud J tends to limit the lrearward movement of the gage when the button K is in its path, the spring O tending IOO io keep ille gage ill iis posiiioll ai` riglli alll gles io ille lille oi' elli, is selnieireular, as bei'ore deseribe 'l, alld is sllown by D', illese eireles beillg siruek lroln a eenier direeily over alld ill lille wiill ille illller edge, e, oi' ille gage. 'l`lle gage is sei so illai'` illis edge e, wlliell, as deseribed, aeis wiill ille knii'e io i'orln a sllear elli, is ill ille proper posiiioll io so aeiV wiilloui eenling ill eoniaei` wiill ille knii'e, alld as ille illller end i'urns on iis eireular bearing,ol wlliell ille edge e is ille eelli'er, iiv will be seen i'llai ille relative posiiion ol` ille edge e alld kllii'e relllaills ille saule no lllaiier wllaii allgle ille gage nlay assunle.

represellis ille poilli oi' aiiaelllnelli ol" ille spring() io ille l'ranle, alld ille poini oi' aiiaelllneni oi' ille sprillg i'o ille gage. 'llle spring i') eall be dispellsed wiill alld llly gage will siill operaie; bui I iind i'llail ii works llluell lnore eonvenienily wiill ille spring, as it keeps ille illller ellds olf ille gages pressed elosely againsi` illeilbearings.

'llle operaiioll oi" llly inveui'ion is as i'ollows: 'llle sioek io be operaied llpoll is plaeed llpoll ille bed alld agaillsi ille gage l),ille elld i oi' ii` passillg illrougll beiweell ille upriglli l lille e ol' ille gage alld ille kniie r". '.llle knife l e is illell earried l'orward by lllealls of' ille lever L, euiiing ille sioek ai; ille allgle indieaied upon ille bed, wlliell lllay be indieaied by lilles, as sllowll ill Fig. il. 'lllese lilles lllay l be lnarked eiillernpon ille edge of ille bed, as sllowll, or llpoll ille sloiied ares )l M. l `or f eonvenienee, I eollsiruei lnydeviee double, so illai` iii lllay be operaied ill eiiller direeiioll, alld ille iwo gages nlay be sei so illai one is ille eolnplenleni of ille oiller, ii' desired. lly nlealls of illis deviee wood or oiller silllilar nlai'erial eau be readily alld quiekly elli llpoll any desired angle. liy adjusting ille gages by lneans ol' ille illunlb-serews ille allgle upon ille wood will eorlespond wiill ille allgle io wlliell ille gages are adjusied. '.llle elli'iers are aii'aelled io ille earriage, so as io be readily rellloved or sei, as oeeasion nlay require. It will be understood illai one 0I ille eniiers lllay be dispellsed wiill; blli l eollsider iwo as desirable.

I do noi wisll io be undersiood as broadly elailnillg a bed wiill guides illereon i'o loeaie ille work alld a sliding eniier io elli ille work upon ille allgle indieaied by said gages, as I anl aware illai llliier-euiiers of various killds llave hereiUOre been used embodying suell device; but

vllai I do elailll io llave illvellied, alld desire io seeure by Leiiers lai'eni, is-

l. In a lniier-eniiing nlaelline, ille eonlbination, wiill a earriage arranged on a bed ill longitudinal ways carrying a eniiing-knife, oi' l all adjusiable gage provided wiill an edge, e, aeiing ill eollneeiion wiill ille knife io lolln a sllear elli;l alld llavillg a selnieireular bearing siruek fronl ille edge e oli' ille gage as a eeni'er, wllereby ille said gage is always ill ille saine relaiive posiiion io ille eui oi' ille kllile, subsialliially as deseribed.

In a nliiirr-eniiing lnaelline, ille eonlbinaiion,wiillilleupriglli I`ranleandille euiiiingkniie,ei' all adjusiable gage llavillg all llpper eireular bearing alld iwo parallel edges, one edge adapied io resi aigaillsi' ille upriglli ['ralne alld ille oillel' edge, e, l'ornling illle eenier of ille curve upon wlliell ille upper bearing-edge is siruek, wllereby ille edge e is adapied io relllaill parallel wiill ille milling-knife, alld al'- ranged ill suell proxilniiy illereio as io lorlll wiill sllell knil'e a sllear eui. subsialliially as deseribei'l.

5l. In a lllaellille foreuiiinglniiers,illeeolllbinai'ion, wiill ille euii ing-kllil'e, oi' a gage llaving all edge. e, and a eireularbearing, and a V plaie or bearing laee lllerelor on ille lllaellillel'ralne, ille eil-ele oi' ille llearillg being si'ruek 'loln ille edge e as a eenier, wllereby said edge is always lllailliailled ill ille sallle relaiive posiiion io ille kllii'e, subsialliially as described. y

l. In a llliier-euiiillg lnaelline, ille eolnbi- `naiion ol ille adjusiable gage, ille llpriglli i'l'allle, illeeonneei ing-spring bei ween ille gage and l'ranle, alld a lugor projeeiion on saidv l'lanle, said gage llavillg a eireular bearing adapied io resi againsi ille said lug, subsialliially as ('leselibed.

5. .llle eonlbillai'ion, ill a nlii'er-eniiing lllaellille, oi ille base llavillg a ellrved sloi' alld all llpriglli iranle, a knil'e arranged io lllove in a longiiudinal way on said l'lallle, a gage adjusiallle in ille eurved sloi', llaving a frolli edge arranged io 'ornl wiill ille knife a sllearw illg-edge and io bear lai erally againsi a posi on ille base, and a projeeiion on ille i'ralne arrallged in Yfroniv el' ille lille ol' said sllearingedge of; ille gage io llold ille said edge ill ill/e saule relaiioll io ille kllii'e ai wllaiever allgle ille gage nlay be plaeed, all subsialliially as deseribed.

i3. ln a nliier-euiiing nlaelline, ille eolnbinaiion oli' ille bed-plaie, ille upriglli 'ranle lllollllied illereon, ille gage I), ille spring i) between ille l'ranle alld ille gage, a eil-cular bearing, D', on ille gage, and ille lllg on ille i'ralne for ille eireulal' lilearing, subsialliially as described.

WILLIAM R. FOX. i

\Vii nesses:

EDwA RD TA G @A n'l, ARTHUR DENlsoN.

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